t_condwait.c revision 312038 
1/* $NetBSD: t_condwait.c,v 1.4 2013/04/12 17:18:11 christos Exp $ */
2
3/*
4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28#include <sys/cdefs.h>
29__RCSID("$NetBSD: t_condwait.c,v 1.4 2013/04/12 17:18:11 christos Exp $");
30
31#include <errno.h>
32#include <pthread.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <string.h>
36#include <time.h>
37#include <unistd.h>
38
39#include <atf-c.h>
40
41#include "isqemu.h"
42
43#ifdef __FreeBSD__
44#include <sys/time.h>
45
46#include "h_common.h"
47#endif
48
49#define WAITTIME 2	/* Timeout wait secound */
50
51static const int debug = 1;
52
53static void *
54run(void *param)
55{
56	struct timespec ts, to, te;
57	clockid_t clck;
58	pthread_condattr_t attr;
59	pthread_cond_t cond;
60	pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
61	int ret = 0;
62
63
64	clck = *(clockid_t *)param;
65#ifdef	__FreeBSD__
66	PTHREAD_REQUIRE(pthread_condattr_init(&attr));
67	PTHREAD_REQUIRE(pthread_condattr_setclock(&attr, clck));
68#else
69	pthread_condattr_init(&attr);
70	pthread_condattr_setclock(&attr, clck); /* MONOTONIC or MONOTONIC */
71#endif
72	pthread_cond_init(&cond, &attr);
73
74	ATF_REQUIRE_EQ((ret = pthread_mutex_lock(&m)), 0);
75
76	ATF_REQUIRE_EQ(clock_gettime(clck, &ts), 0);
77	to = ts;
78
79	if (debug)
80		printf("started: %lld.%09ld sec\n", (long long)to.tv_sec,
81		    to.tv_nsec);
82
83	ts.tv_sec += WAITTIME;	/* Timeout wait */
84
85	switch (ret = pthread_cond_timedwait(&cond, &m, &ts)) {
86	case ETIMEDOUT:
87		/* Timeout */
88		ATF_REQUIRE_EQ(clock_gettime(clck, &te), 0);
89		timespecsub(&te, &to, &to);
90		if (debug) {
91			printf("timeout: %lld.%09ld sec\n",
92			    (long long)te.tv_sec, te.tv_nsec);
93			printf("elapsed: %lld.%09ld sec\n",
94			    (long long)to.tv_sec, to.tv_nsec);
95		}
96		if (isQEMU()) {
97			double to_seconds = to.tv_sec + 1e-9 * to.tv_nsec;
98			ATF_REQUIRE(to_seconds >= WAITTIME * 0.9);
99			/* Loose upper limit because of qemu timing bugs */
100			ATF_REQUIRE(to_seconds < WAITTIME * 2.5);
101		} else {
102			ATF_REQUIRE_EQ(to.tv_sec, WAITTIME);
103		}
104		break;
105	default:
106		ATF_REQUIRE_MSG(0, "pthread_cond_timedwait: %s", strerror(ret));
107	}
108
109	ATF_REQUIRE_MSG(!(ret = pthread_mutex_unlock(&m)),
110	    "pthread_mutex_unlock: %s", strerror(ret));
111	pthread_exit(&ret);
112}
113
114static void
115cond_wait(clockid_t clck, const char *msg) {
116	pthread_t child;
117
118	if (debug)
119		printf( "**** %s clock wait starting\n", msg);
120	ATF_REQUIRE_EQ(pthread_create(&child, NULL, run, &clck), 0);
121	ATF_REQUIRE_EQ(pthread_join(child, NULL), 0); /* wait for terminate */
122	if (debug)
123		printf( "**** %s clock wait ended\n", msg);
124}
125
126ATF_TC(cond_wait_real);
127ATF_TC_HEAD(cond_wait_real, tc)
128{
129	atf_tc_set_md_var(tc, "descr", "Checks pthread_cond_timedwait "
130	    "with CLOCK_REALTIME");
131}
132
133ATF_TC_BODY(cond_wait_real, tc) {
134	cond_wait(CLOCK_REALTIME, "CLOCK_REALTIME");
135}
136
137ATF_TC(cond_wait_mono);
138ATF_TC_HEAD(cond_wait_mono, tc)
139{
140	atf_tc_set_md_var(tc, "descr", "Checks pthread_cond_timedwait "
141	    "with CLOCK_MONOTONIC");
142}
143
144ATF_TC_BODY(cond_wait_mono, tc) {
145	cond_wait(CLOCK_MONOTONIC, "CLOCK_MONOTONIC");
146}
147
148ATF_TP_ADD_TCS(tp)
149{
150	ATF_TP_ADD_TC(tp, cond_wait_real);
151	ATF_TP_ADD_TC(tp, cond_wait_mono);
152	return 0;
153}
154